Bearing



W. G. O. STIEB ER BEARING Filed Oct. 22/1957 Fig. 3

Fig. 2

Inventor-.-

M'lb clm Gasiav 050 15122330 5y A A Patented Dec. 13,- 1938 UNITED STATES.

PATENT O'FFlCE I amass ammo; Wilhelm Gustav on Stieber, men, Germany Application October 22, r In Germany 1937, Serial No. 170,339 June 19,

8 came. .(01; 308-236) The present invention relates to a bearing in which the clearance can be adjusted.

Devices are known in the art by means of which the clearance of the bearing can be adjusted. In

| these devices the form-stability of the bearing is very often reduced by the arrangement of slots;

besides this,' there are unsymmetric forces, or

forces which act on certain points only whichforces change the cylindrical form of the bear- 1. ing surface in a not uniform manner and also the bearing with a cone shaped bushing the cone surface of which, by means of axial displacement no of a second cone shaped bushing, can be pressed towards the first bushing whereby a deformation of the first bushing and the bearing member connected therewith in essentially radial direction is produced. 25 Further and otherobiects of the present invention will be hereinafter set forth in the accompanying specification and claims and are shown in the drawing which, by way of illustration schematically shows what I now consider to be 30 three preferred embodiments of my invention.

I 40 drawing, a bushing 2 is arranged within a bearing body I which bushing is held to the body I by means of screws 3. The interior bore of the bushing is cone shaped. Within said bore is a bushing 6, whichghas a suitable countercone and which is, however, of smaller diameter. v-In be,- tween the cone surfaces of the bushings .2 and 6, distributed over the entire circumference, rollers 4 are provided, which are guided, for example, in a cage'5 in such manner that the axes of the rollers are twisted-with respect to the axis of the shaft I2 by a generally small angle 11". -The openings in the cage can be of such formation that two or more rollers can be located in one opening. Instead of cage i other provisions can be made for assuring the twisted position of the rollers.

The bearing proper I on which the shaft I2 rests is located in the bushing 6. Bushing 6 and bearing I can also be' made of one piece. 5

Bushing 6 carries teeth 8 which Jfit into the intervals between corresponding teeth in disk 9. Disk 9 may be held in position, for example, by

' means of clamp screws III. Disk 9 and the screws I! together secure bushing 8 against torsion. 10

Bushing 6 and bearing 1 may be split into a plurality of parts. A plurality of cages with a pluralityof rows of rollers may be arranged side by side.

If one removes the members 9 and Ill and turns 16 bushing 6 in the direction of arrow I3, i. e., clockwise when looking from left to right on Fig. 1, bushing 8 rolls on the interior .cone of bushing 2 by means of the rollers 4. Due to the twisted position shown by the angle a. of rollers 20 I with respect to the axis of the shaft there is at the same time an axial movement of bushing 6 in the direction of arrow I I. Due to the cone shaped configuration of bushings 2 and 6 pressures are exerted between the cone surfaces and the rollers which are so greatv that bushing 6 andbearing 1 are radially compressed.- The clearance betweenathe bearing I and the shaft I2 is thereby reduced.

In the embodiment of my invention according o to Fig. 2 of the drawing,,a bushing 2, is located within the bearing body I and is held thereto by means of screws 3. The bore of bushing 2 is cone shaped. Balls I 4 are situated within said bore which balls are guided in spiral groves I5 of a sui le cone shaped bushing I6, These groves may lso be provided in bushing 2 or in both bushings 2 and I6. Bushing I6 has teeth 20 which cooperate with clearances in disk 9 which issecured against torsion by means of screws III which rigidly connect disk 9 with the body I.

" Bushing II and ball race I! may be made of one piece.

If, after removal of members! and I0, bushing I8 is revolved in the direction of the ar- 5 row I3, it rolls on bushing 2 by means of balls I4 whereby an axial movement is produced according to the pitch of groves I5, which movement causes great pressure between the surfaces The pressure causes a radial deformation of the bushing I6 and the ball race I! and thereby changes the clearance of the ball bearing.

Groves l5 and balls ll according to Fig. 2 may also be provided in the embodiment of my in- 5 vention shown in Fig. 1, the latter instead of the rollers 4. Rollers 4 and cage 5 according to Fig. 1

Theaction of both arrangements is principally the same. Revolving of bushings 6 in Fig. 1 and IS in Fig. 2 requires comparatively. little power because rolling friction only need be overcome.

In-Flg. 3 another embodiment of the present invention is shown; this embodiment is shown as applied to a. plain bearing. Bushing 2 which forms the bearing is rigidly connected to the bearing body I. 4

A bushing 2| serving as revolving bushing rests on a bushing 22, having a cone shaped bore. Within said bore rollers 23 are located in twisted position as they are in the embodiment illustrated in Fig. 1; the rollers roll on a bushing 24 having a cone shaped outer surface and being fixed to .shaft- 25.

In place of the rollers in twisted position balls which are guided in groves may be used, as are shown in Fig. 2.

Bushing 24 and shaft 25 as well as bushings 2| and 22 may be made of one piece. I

In the embodiment of the invention shown in Fig. 3 ring .26 which is screwed to shaft 25 serves for locking bushing 22 in its position. If ring 26 is loosened and bushing v22 is revolved, an axial displacement of bushing 22 with respect to bushing 24 takesplace. The forces created thereby increase the diameter of bushing 22 and of bushing 2i. Thereby the clearance'of the plain bearing is changed. The arrangement can also be used for a roller bearing.

' The bearing construction as per-the present invention is particularly useful, where the clear- Y skilled in the art.

ance must be held as small as possible for assuring exact operation of a shaft or a spindle.

The bearing construction according to the presentinvention whereby the clearance can be adjusted at will is also useful for testing ballor roller hearings on the test bed; bearings have different clearances according to their operating conditions; by means of the present invention any clearance, i. e.,.any operating condition can be established on the test bed.

While I believe the above described embodi ments of my invention to be preferred embodiments, I wish it to be understood that I do not desire to be limited to the exact details of design and construction shown and described, for obvious modifications will occur to aperson I claim:

1. A bearing for supporting a part which is rotatable in said bearing, said bearing having an adjustable clearance and comprising a pair of members provided with cone shaped surfaces an adjustable clearance and comprising a pair of members provided with cone shaped surfaces which surfaces are disposed substantially concentric within one another, roller means displaced in between said cone shaped surfaces, and

being in a twisted position with respect to the axis-of rotation of said bearing, one of said members being axially displaceable whereby, due to said twisted position, said members are pressed toward said means with more or less pressure and at least one of said members is radially deformed and the clearance of the bearing changed.

3. A bearing for. supporting a part which is rotatable in said bearing, said bearinghaving an adjustable clearance and comprising a pair of members provided with cone shaped surfaces which surfaces are disposed substantially concentric within one another, roller means displaced in between said cone shaped surfaces,

shaped surfacm which surfaces are disposed substantially concentric within one another, rolling means displaced in between said cone shaped surfaces, guide means which are in twisted position with respect to the axis of rotation of said bearing and adjacent to and adapted to guide' said rolling means, one of said members being axially displaceable whereby said members are pressed towards said means with more or less pressure and at least one of said members is radially deformed and the clearance of the hearing is changed.

5. A bearing having an adjustable clearance and comprising a pair of members with cone shaped surfaces which surfaces are disposed substantially concentric within one another, balls displaced in between said cone shapedsurfaces, a spiral grove in one ofsaid surfaces adjacent to and guiding said balls, one of said members being revolvable whereby, due to said balls and spiral groves, said members move in axial direction with respect to one another and said members are. pressed towards one another, the pressure being transmitted from one member to the other by means of said balls, and at least one of said .and comprising a pair of members with cone members is radially deformed, and the clearance of said bearing is changed.

6. A bearing for supporting apart which is rotatable in said bearing, said bearing having an adjustable" clearance and comprising a pair of members provided with cone shaped surfaces which surfaces are disposed substantially concentric within one another, roller means displaced in between said cone shaped surfaces, one

of said members being axially displaceable whereby said members are pressed towards said means with more or less pressure and at least one of said members is radially deformed and the clearance of the bearing changed, both of said members being stationary, i. e. do not take part in the rotation of the part supported by said bearing.

qA bearing for supporting a part whichis rotatable in said bearing, said bearing having an adjustable clearance and comprising a pair of I members provided with cone shaped surfaces which surfaces are disposed substantially co'ncen- 26 tric within one another, means displaced in between said cone shaped surfaces, one' of said members being axially displaceable whereby said members are pressed towards said means with more or lesspressure and at least one of said members is radially deformed and the clearance of the bearing-changed, both of said members being connectedto and rotating with the part sup- P rted by said bearing. 3

8..A bearing for supporting a part which is rotatable in said bearing. said bearing having an adjustable clearance and comprising a pair 0! members .provided with cone shaped surfaces which surfaces are disposed nibstantiaily eona,uo,sss 3 centric within one another, roller means. displaced in between said cone shaped surfaces, one of said members being axially displaceable whereby said members are pressed towards said means with more or less pressure and at least one of said members is radially deformed and the clearance oi the bearing changed, a holding member which is adjustably connected with one of said first mentioned members and which is also connected with the other of said first mentioned members whereby the position 01' said first; mentioned members with respect to one another is adJustably maintained.

mm GUSTAV O'I'IO B'I'IEBER. 

